Studies on the green and blue mold of Satsuma orange. (I)

Penicillium decays of Satsuma orange fruits in storage were observed in Tokushima from 1954 to 1958. Green mold caused by Penicillium digitatum occur-red in higher rate than blue mold caused by P. italicum. Green mold was commonly observed in early period of storage, and blue mold occurred later. From the inoculation experiments under storage condition, it was found that the incubation period of green mold was shorter than that of blue mold. Very easy infection of Penicillium was obtained when the oil glands were pricked. Freshness of wound of fruit rind was necessary for the infection of P. digitatum, while it was un; necessary in the case of P. italicum.